Balanced slide-valve



(No Model.)

E. HAUG.

BALANGED'SLIDB VALVE. A No. 250,808. Patented Deo. 1'3, 1881.

UNITED STATES PATENT @Erica EDMUND HAUG, OF WHISTLER, ALABAMA.

BALANCED SLI DE-VALVE.A

SPECIFICATION forming part of Letters Patent No. 250,808, dated December 13, 1881,

Application filed June 23, 1881.

To alt whom t may concern:

Beit known thatLEDMUND HAUG, of Whistler, in the county of Mobile and State ot Alabama, have invented a new and useful Improvement in Balanced Slide-Valves for Steam and other Engines, ot" which the following is a full and clear description, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in balanced slide-valves for steam-engines; and it consists, iirst, in the combination of one or more automatically-acting steam and air pistons with a balanced slide-valve; second, in a balanced slide-valve, in combination with one or more automatically-acting steam and air pistons, cranks provided with toothed hubs, and a rotating ring having its lower edge formed into inclined planes, for the purpose ofpressing the cylindrical chamber down upon the top of the slide-valve; third, in automatically-acting pistons, cranks, and rotating ring with inclined planes, havinga projectingrim on its outer circumference and projecting lips on the bottom part of its inner circumference, said lips running parallel with the inclined planes; fourth, in automaticallyacting steam and air pistons, cranks with toothed'hubs conf nected t0 the pistons, a rotating ring provided with teeth and made to engage with the cranks, a cylindrical casting for bearing down upon the slide-valve, and which is provided with guiding-pieces to catch over the lips formed on the rotating ring, as will he more fully described hereinafter.

The object of my invention is to relieve the slide-valve of all the undue pressure and fric-v tion which almost all balanced slide-valves have to contend with when the steam is shut oli' and the engine continues to run from momentum, as is specially the case with locomotives in running upon downgrades.

Figurelis a side elevation, showing one-half in vertical section. Fig. 2 is a plan view of the same, showing a portion of the cover and a part of one of the pistons removed.

A represents a steam-chest; B, the slidevalve 5 C, the cylindrical chamber which bears upon the top of the slide-valve; D, the rotating ring, which is placed inside ot' the circular top (No model.)

partof the steam-chest, and which has its lower edge formed into inclined planes, so as to cor- -E, the coiled spring which serves to rotate the ring and cause the ring to bear down upon the top edge of the circular casting; F, the cover, and G a device of any suitable description for increasing or decreasing the tension ot' the spring, so as to cause a greater or less pressure of the ring upon the circular casting. All these parts are fully described in my former Patent No. 225,370, and hence need not be more particularly described in this connection.

The present improvement consists in the addition of certain automatically-acting steam andair pistons for causing the ring to rotate when the steam is shut off, and thus relieve the pressure upon the slide-valve.

rlhe ring D has formed upon its upper outer edge the projection or rim H, which tits in-a corresponding recess made `in the top part of the steam-chest, and upon the outer circumference of the ring D are formed teeth l, which mesh with the teeth which are formed upon the inner edges of the hubs of the cranks J. These cranks are pivoted upon suitable pins and projections K, cast with or secured to the side of the upper portion ofthe chamber, and the onterendsofthe cranks are connectedin any suitable manner with the air and steam pis tons L. Through the top of the steam-chest are made the two openings M, which communicate with the inside of the steam-chest and of the cylinders N, in which the pistons L move. While the steam is turned on it passes up through these openings and forces the pistons outward, thereby turning the cranks to such an extent that their teeth do not engage with the ring D, and hence the spring exerts its full force upon the inclined ring, so as to force it down upon the top of the circular chamber and slide-valve. When, however, the steam is shut off from the chest and .there is more or less vacuum formed therein, the pressure of the atmosphere against the outer ends of the pistons force them inward, and, the cranks being turned as shown in Fig. 2, the teeth of the cranks are made to engage with the teeth of the ring D. As the/pistons are forced inward by the pressure of the atmosphere the IOO ring is caused to rotate against the tension of the spring and to cause its inclined planes to move up the inclined planes formed on the top of the circular casting or chamber.

In order that the rotation of the ring D may lift the circular casting up from the top ofthe slide-Valve, and thus remove all unnecessary friction from the valve, suitable lips, l', are formed upon opposite and inner sides ot` the ring, and these lips run in a parallel line with the inclined planes formed on the lower edge of the ring. The circular casting'has formed upon its top inner edges suitable U-shaped .lips orflanges, which catch over the lipsf'ormed upon the inner side ofthe ring, and which U- shaped flan ges are shorter than the lips formed upon the ring. As the ring is made to rotate and move up the inclined planes formed upon the top of the circular casting the latter isY raised by the action of the ring so as to take all the pressure from the top ofthe valve, and hence the valve can Work freely back and forth in the chest with no other friction than its bearing upon the top ofthe cylinder-valve seat.

I vclaiml. The combination ofa balanced slide-valve with one or more automatically-acting steam and air pistons, substantially as shown.

2. In a balanced slide-valve, the 'combination of one or more automatic-acting pistons, cranks provided with toothed hubs, and a ring provided with inclined planes, and which exerts a pressure upon the slide-Valve to keep it upon its seat, substantially as described.

3. The combination of the automatically-acting pistons, cranks provided with toothed hubs, a ring provided with inclined planes, a projecting rim on its outer circumference, and projecting lips on its inner bottom edge, said lips running parallel with said inclined planes, substantially as set forth. n

4. The combination of the autom atically-acting pistons, the cranks attached thereto and acting upon the ring so as to canse it to oscillate, and the cylindrical chamber in which the ring is placed, the chamber being provided withlguide-pieces to tit over the lips ot1 the ring, substantially as specified.

Intestimony that I claim the foregoing I have hereunto set my hand this 20th day of June, 1881..

EDMUND HAUG.

IVitnesses GEO. W. DALY, S. T. OWEN. 

